1: # The LearningOnline Network
2: # Login Screen
3: #
4: # $Id: lonlogin.pm,v 1.158.2.13.2.2 2022/01/16 23:31:27 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::lonlogin;
30:
31: use strict;
32: use Apache::Constants qw(:common);
33: use Apache::File ();
34: use Apache::lonnet;
35: use Apache::loncommon();
36: use Apache::lonauth();
37: use Apache::lonlocal;
38: use Apache::migrateuser();
39: use lib '/home/httpd/lib/perl/';
40: use LONCAPA qw(:DEFAULT :match);
41: use URI::Escape;
42: use HTML::Entities();
43: use CGI::Cookie();
44:
45: sub handler {
46: my $r = shift;
47:
48: &Apache::loncommon::get_unprocessed_cgi
49: (join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},
50: $ENV{'REDIRECT_QUERY_STRING'}),
51: ['interface','username','domain','firsturl','localpath','localres',
52: 'token','role','symb','iptoken','btoken','ltoken','ttoken','linkkey',
53: 'saml','sso','retry']);
54:
55: # -- check if they are a migrating user
56: if (defined($env{'form.token'})) {
57: return &Apache::migrateuser::handler($r);
58: }
59:
60: my $lonhost = $r->dir_config('lonHostID');
61: if ($env{'form.ttoken'}) {
62: my %info = &Apache::lonnet::tmpget($env{'form.ttoken'});
63: &Apache::lonnet::tmpdel($env{'form.ttoken'});
64: if ($info{'origurl'}) {
65: $env{'form.firsturl'} = $info{'origurl'};
66: }
67: if ($info{'ltoken'}) {
68: $env{'form.ltoken'} = $info{'ltoken'};
69: } elsif ($info{'linkprot'}) {
70: $env{'form.linkprot'} = $info{'linkprot'};
71: } elsif ($info{'linkkey'} ne '') {
72: $env{'form.linkkey'} = $info{'linkkey'};
73: }
74: } elsif (($env{'form.sso'}) || ($env{'form.retry'})) {
75: my $infotoken;
76: if ($env{'form.sso'}) {
77: $infotoken = $env{'form.sso'};
78: } else {
79: $infotoken = $env{'form.retry'};
80: }
81: my $data = &Apache::lonnet::reply('tmpget:'.$infotoken,$lonhost);
82: unless (($data=~/^error/) || ($data eq 'con_lost') ||
83: ($data eq 'no_such_host')) {
84: my %info = &decode_token($data);
85: foreach my $item (keys(%info)) {
86: $env{'form.'.$item} = $info{$item};
87: }
88: &Apache::lonnet::tmpdel($infotoken);
89: }
90: } else {
91: if (!defined($env{'form.firsturl'})) {
92: &Apache::lonacc::get_posted_cgi($r,['firsturl']);
93: }
94: if (!defined($env{'form.firsturl'})) {
95: if ($ENV{'REDIRECT_URL'} =~ m{^/+tiny/+$LONCAPA::match_domain/+\w+$}) {
96: $env{'form.firsturl'} = $ENV{'REDIRECT_URL'};
97: }
98: }
99: if (($env{'form.firsturl'} =~ m{^/+tiny/+$LONCAPA::match_domain/+\w+$}) &&
100: (!$env{'form.ltoken'}) && (!$env{'form.linkprot'}) && (!$env{'form.linkkey'})) {
101: &Apache::lonacc::get_posted_cgi($r,['linkkey']);
102: }
103: if ($env{'form.firsturl'} eq '/adm/logout') {
104: delete($env{'form.firsturl'});
105: }
106: }
107:
108: # For "public user" - remove any exising "public" cookie, as user really wants to log-in
109: my ($handle,$lonidsdir,$expirepub,$userdom);
110: $lonidsdir=$r->dir_config('lonIDsDir');
111: unless ($r->header_only) {
112: $handle = &Apache::lonnet::check_for_valid_session($r,'lonID',undef,\$userdom);
113: if ($handle ne '') {
114: if ($handle=~/^publicuser\_/) {
115: unlink($r->dir_config('lonIDsDir')."/$handle.id");
116: undef($handle);
117: undef($userdom);
118: $expirepub = 1;
119: }
120: }
121: }
122:
123: &Apache::loncommon::no_cache($r);
124: &Apache::lonlocal::get_language_handle($r);
125: &Apache::loncommon::content_type($r,'text/html');
126: if ($expirepub) {
127: my $c = new CGI::Cookie(-name => 'lonPubID',
128: -value => '',
129: -expires => '-10y',);
130: $r->header_out('Set-cookie' => $c);
131: } elsif (($handle eq '') && ($userdom ne '')) {
132: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
133: foreach my $name (keys(%cookies)) {
134: next unless ($name =~ /^lon(|S|Link|Pub)ID$/);
135: my $c = new CGI::Cookie(-name => $name,
136: -value => '',
137: -expires => '-10y',);
138: $r->headers_out->add('Set-cookie' => $c);
139: }
140: }
141: $r->send_http_header;
142: return OK if $r->header_only;
143:
144:
145: # Are we re-routing?
146: my $londocroot = $r->dir_config('lonDocRoot');
147: if (-e "$londocroot/lon-status/reroute.txt") {
148: &Apache::lonauth::reroute($r);
149: return OK;
150: }
151:
152: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
153:
154: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r,1);
155: if ($found_server) {
156: my $hostname = &Apache::lonnet::hostname($found_server);
157: if ($hostname ne '') {
158: my $protocol = $Apache::lonnet::protocol{$found_server};
159: $protocol = 'http' if ($protocol ne 'https');
160: my $dest = '/adm/roles';
161: if ($env{'form.firsturl'} ne '') {
162: $dest = &HTML::Entities::encode($env{'form.firsturl'},'\'"<>&');
163: }
164: my %info = (
165: balcookie => $lonhost.':'.$balancer_cookie,
166: );
167: if ($env{'form.role'}) {
168: $info{'role'} = $env{'form.role'};
169: }
170: if ($env{'form.symb'}) {
171: $info{'symb'} = $env{'form.symb'};
172: }
173: my $balancer_token = &Apache::lonnet::tmpput(\%info,$found_server);
174: unless (($balancer_token eq 'con_lost') || ($balancer_token eq 'refused') ||
175: ($balancer_token eq 'unknown_cmd') || ($balancer_token eq 'no_such_host')) {
176: $dest .= (($dest=~/\?/)?'&':'?') . 'btoken='.$balancer_token;
177: }
178: if ($env{'form.firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
179: my %link_info;
180: if ($env{'form.ltoken'}) {
181: $link_info{'ltoken'} = $env{'form.ltoken'};
182: } elsif ($env{'form.linkprot'}) {
183: $link_info{'linkprot'} = $env{'form.linkprot'};
184: } elsif ($env{'form.linkkey'} ne '') {
185: $link_info{'linkkey'} = $env{'form.linkkey'};
186: }
187: if (keys(%link_info)) {
188: $link_info{'origurl'} = $env{'form.firsturl'};
189: my $token = &Apache::lonnet::tmpput(\%link_info,$found_server,'link');
190: unless (($token eq 'con_lost') || ($token eq 'refused') ||
191: ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
192: $dest .= (($dest=~/\?/)?'&':'?') . 'ttoken='.$token;
193: }
194: }
195: }
196: unless ($found_server eq $lonhost) {
197: my $alias = &Apache::lonnet::use_proxy_alias($r,$found_server);
198: $hostname = $alias if ($alias ne '');
199: }
200: my $url = $protocol.'://'.$hostname.$dest;
201: my $start_page =
202: &Apache::loncommon::start_page('Switching Server ...',undef,
203: {'redirect' => [0,$url],});
204: my $end_page = &Apache::loncommon::end_page();
205: $r->print($start_page.$end_page);
206: return OK;
207: }
208: }
209:
210: #
211: # Check if a LON-CAPA load balancer sent user here because user's browser sent
212: # it a balancer cookie for an active session on this server.
213: #
214:
215: my $balcookie;
216: if ($env{'form.btoken'}) {
217: my %info = &Apache::lonnet::tmpget($env{'form.btoken'});
218: $balcookie = $info{'balcookie'};
219: &Apache::lonnet::tmpdel($env{'form.btoken'});
220: delete($env{'form.btoken'});
221: }
222:
223: #
224: # If browser sent an old cookie for which the session file had been removed
225: # check if configuration for user's domain has a portal URL set. If so
226: # switch user's log-in to the portal.
227: #
228:
229: if (($handle eq '') && ($userdom ne '')) {
230: my %domdefaults = &Apache::lonnet::get_domain_defaults($userdom);
231: if ($domdefaults{'portal_def'} =~ /^https?\:/) {
232: my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,
233: {'redirect' => [0,$domdefaults{'portal_def'}],});
234: my $end_page = &Apache::loncommon::end_page();
235: $r->print($start_page.$end_page);
236: return OK;
237: }
238: }
239:
240: # -------------------------------- Prevent users from attempting to login twice
241: if ($handle ne '') {
242: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
243: my $start_page =
244: &Apache::loncommon::start_page('Already logged in');
245: my $end_page =
246: &Apache::loncommon::end_page();
247: my $dest = '/adm/roles';
248: if ($env{'form.firsturl'} ne '') {
249: $dest = &HTML::Entities::encode($env{'form.firsturl'},'\'"<>&');
250: }
251: if (($env{'form.ltoken'}) || ($env{'form.linkprot'})) {
252: my $linkprot;
253: if ($env{'form.ltoken'}) {
254: my %info = &Apache::lonnet::tmpget($env{'form.ltoken'});
255: $linkprot = $info{'linkprot'};
256: my $delete = &Apache::lonnet::tmpdel($env{'form.ltoken'});
257: } else {
258: $linkprot = $env{'form.linkprot'};
259: }
260: if ($linkprot) {
261: my ($linkprotector,$deeplink) = split(/:/,$linkprot,2);
262: if ($env{'user.linkprotector'}) {
263: my @protectors = split(/,/,$env{'user.linkprotector'});
264: unless (grep(/^\Q$linkprotector\E$/,@protectors)) {
265: push(@protectors,$linkprotector);
266: @protectors = sort { $a <=> $b } @protectors;
267: &Apache::lonnet::appenv({'user.linkprotector' => join(',',@protectors)});
268: }
269: } else {
270: &Apache::lonnet::appenv({'user.linkprotector' => $linkprotector });
271: }
272: if ($env{'user.linkproturi'}) {
273: my @proturis = split(/,/,$env{'user.linkproturi'});
274: unless (grep(/^\Q$deeplink\E$/,@proturis)) {
275: push(@proturis,$deeplink);
276: @proturis = sort @proturis;
277: &Apache::lonnet::appenv({'user.linkproturi' => join(',',@proturis)});
278: }
279: } else {
280: &Apache::lonnet::appenv({'user.linkproturi' => $deeplink});
281: }
282: }
283: } elsif ($env{'form.linkkey'} ne '') {
284: if ($env{'form.firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
285: my $linkkey = $env{'form.linkkey'};
286: if ($env{'user.deeplinkkey'}) {
287: my @linkkeys = split(/,/,$env{'user.deeplinkkey'});
288: unless (grep(/^\Q$linkkey\E$/,@linkkeys)) {
289: push(@linkkeys,$linkkey);
290: &Apache::lonnet::appenv({'user.deeplinkkey' => join(',',sort(@linkkeys))});
291: }
292: } else {
293: &Apache::lonnet::appenv({'user.deeplinkkey' => $linkkey});
294: }
295: my $deeplink = $env{'form.firsturl'};
296: if ($env{'user.keyedlinkuri'}) {
297: my @keyeduris = split(/,/,$env{'user.keyedlinkuri'});
298: unless (grep(/^\Q$deeplink\E$/,@keyeduris)) {
299: push(@keyeduris,$deeplink);
300: &Apache::lonnet::appenv({'user.keyedlinkuri' => join(',',sort(@keyeduris))});
301: }
302: } else {
303: &Apache::lonnet::appenv({'user.keyedlinkuri' => $deeplink});
304: }
305: }
306: }
307: $r->print(
308: $start_page
309: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
310: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
311: '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
312: .$end_page
313: );
314: return OK;
315: }
316:
317: # ---------------------------------------------------- No valid token, continue
318:
319: # ---------------------------- Not possible to really login to domain "public"
320: if ($env{'form.domain'} eq 'public') {
321: $env{'form.domain'}='';
322: $env{'form.username'}='';
323: }
324:
325: # ------ Is this page requested because /adm/migrateuser detected an IP change?
326: my %sessiondata;
327: if ($env{'form.iptoken'}) {
328: %sessiondata = &Apache::lonnet::tmpget($env{'form.iptoken'});
329: unless ($sessiondata{'sessionserver'}) {
330: my $delete = &Apache::lonnet::tmpdel($env{'form.iptoken'});
331: delete($env{'form.iptoken'});
332: }
333: }
334: # ----------------------------------------------------------- Process Interface
335: $env{'form.interface'}=~s/\W//g;
336:
337: (undef,undef,undef,undef,undef,undef,my $clientmobile) =
338: &Apache::loncommon::decode_user_agent($r);
339:
340: my $iconpath=
341: &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
342:
343: my $domain = &Apache::lonnet::default_login_domain();
344: my $defdom = $domain;
345: if ($lonhost ne '') {
346: unless ($sessiondata{'sessionserver'}) {
347: my $redirect = &check_loginvia($domain,$lonhost,$lonidsdir,$balcookie);
348: if ($redirect) {
349: $r->print($redirect);
350: return OK;
351: }
352: }
353: }
354:
355: if (($sessiondata{'domain'}) &&
356: (&Apache::lonnet::domain($sessiondata{'domain'},'description'))) {
357: $domain=$sessiondata{'domain'};
358: } elsif (($env{'form.domain'}) &&
359: (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
360: $domain=$env{'form.domain'};
361: }
362:
363: my $role = $r->dir_config('lonRole');
364: my $loadlim = $r->dir_config('lonLoadLim');
365: my $uloadlim= $r->dir_config('lonUserLoadLim');
366: my $servadm = $r->dir_config('lonAdmEMail');
367: my $tabdir = $r->dir_config('lonTabDir');
368: my $include = $r->dir_config('lonIncludes');
369: my $expire = $r->dir_config('lonExpire');
370: my $version = $r->dir_config('lonVersion');
371: my $host_name = &Apache::lonnet::hostname($lonhost);
372:
373: # --------------------------------------------- Default values for login fields
374:
375: my ($authusername,$authdomain);
376: if ($sessiondata{'username'}) {
377: $authusername=$sessiondata{'username'};
378: } else {
379: $env{'form.username'} = &Apache::loncommon::cleanup_html($env{'form.username'});
380: $authusername=($env{'form.username'}?$env{'form.username'}:'');
381: }
382: if ($sessiondata{'domain'}) {
383: $authdomain=$sessiondata{'domain'};
384: } else {
385: $env{'form.domain'} = &Apache::loncommon::cleanup_html($env{'form.domain'});
386: $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
387: }
388:
389: # ---------------------------------------------------------- Determine own load
390: my $loadavg;
391: {
392: my $loadfile=Apache::File->new('/proc/loadavg');
393: $loadavg=<$loadfile>;
394: }
395: $loadavg =~ s/\s.*//g;
396:
397: my ($loadpercent,$userloadpercent);
398: if ($loadlim) {
399: $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
400: }
401: if ($uloadlim) {
402: $userloadpercent=&Apache::lonnet::userload();
403: }
404:
405: my $firsturl=
406: ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
407:
408: # ----------------------------------------------------------- Get announcements
409: my $announcements=&Apache::lonnet::getannounce();
410: # -------------------------------------------------------- Set login parameters
411:
412: my @hexstr=('0','1','2','3','4','5','6','7',
413: '8','9','a','b','c','d','e','f');
414: my $lkey='';
415: for (0..7) {
416: $lkey.=$hexstr[rand(15)];
417: }
418:
419: my $ukey='';
420: for (0..7) {
421: $ukey.=$hexstr[rand(15)];
422: }
423:
424: my $lextkey=hex($lkey);
425: if ($lextkey>2147483647) { $lextkey-=4294967296; }
426:
427: my $uextkey=hex($ukey);
428: if ($uextkey>2147483647) { $uextkey-=4294967296; }
429:
430: # -------------------------------------------------------- Store away log token
431: my ($tokenextras,$tokentype);
432: my @names = ('role','symb','iptoken','ltoken','linkprot','linkkey');
433: foreach my $name (@names) {
434: if ($env{'form.'.$name} ne '') {
435: if ($name eq 'ltoken') {
436: my %info = &Apache::lonnet::tmpget($env{'form.'.$name});
437: if ($info{'linkprot'}) {
438: $tokenextras .= '&linkprot='.&escape($info{'linkprot'});
439: $tokentype = 'link';
440: last;
441: }
442: } else {
443: $tokenextras .= '&'.$name.'='.&escape($env{'form.'.$name});
444: if (($name eq 'linkkey') || ($name eq 'linkprot')) {
445: $tokentype = 'link';
446: }
447: }
448: }
449: }
450: if ($tokentype) {
451: $tokenextras .= ":$tokentype";
452: }
453: my $logtoken=Apache::lonnet::reply(
454: 'tmpput:'.$ukey.$lkey.'&'.&escape($firsturl).$tokenextras,
455: $lonhost);
456:
457: # -- If we cannot talk to ourselves, or hostID does not map to a hostname
458: # we are in serious trouble
459:
460: if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) {
461: if ($logtoken eq 'no_such_host') {
462: &Apache::lonnet::logthis('No valid logtoken for log-in page -- unable to determine hostname for hostID: '.$lonhost.'. Check entry in hosts.tab');
463: }
464: if ($env{'form.ltoken'}) {
465: &Apache::lonnet::tmpdel($env{'form.ltoken'});
466: delete($env{'form.ltoken'});
467: }
468: my $spares='';
469: my (@sparehosts,%spareservers);
470: my $sparesref = &Apache::lonnet::this_host_spares($defdom);
471: if (ref($sparesref) eq 'HASH') {
472: foreach my $key (keys(%{$sparesref})) {
473: if (ref($sparesref->{$key}) eq 'ARRAY') {
474: my @sorted = sort { &Apache::lonnet::hostname($a) cmp
475: &Apache::lonnet::hostname($b);
476: } @{$sparesref->{$key}};
477: if (@sorted) {
478: if ($key eq 'primary') {
479: unshift(@sparehosts,@sorted);
480: } elsif ($key eq 'default') {
481: push(@sparehosts,@sorted);
482: }
483: }
484: }
485: }
486: }
487: foreach my $hostid (@sparehosts) {
488: next if ($hostid eq $lonhost);
489: my $hostname = &Apache::lonnet::hostname($hostid);
490: next if (($hostname eq '') || ($spareservers{$hostname}));
491: $spareservers{$hostname} = 1;
492: my $protocol = $Apache::lonnet::protocol{$hostid};
493: $protocol = 'http' if ($protocol ne 'https');
494: $spares.='<br /><span style="font-size: larger;"><a href="'.$protocol.'://'.
495: $hostname.
496: '/adm/login?domain='.$authdomain.'">'.
497: $hostname.'</a>'.
498: ' '.&mt('(preferred)').'</span>'.$/;
499: }
500: if ($spares) {
501: $spares.= '<br />';
502: }
503: my %all_hostnames = &Apache::lonnet::all_hostnames();
504: foreach my $hostid (sort
505: {
506: &Apache::lonnet::hostname($a) cmp
507: &Apache::lonnet::hostname($b);
508: }
509: keys(%all_hostnames)) {
510: next if ($hostid eq $lonhost);
511: my $hostname = &Apache::lonnet::hostname($hostid);
512: next if (($hostname eq '') || ($spareservers{$hostname}));
513: $spareservers{$hostname} = 1;
514: my $protocol = $Apache::lonnet::protocol{$hostid};
515: $protocol = 'http' if ($protocol ne 'https');
516: $spares.='<br /><a href="'.$protocol.'://'.
517: $hostname.
518: '/adm/login?domain='.$authdomain.'">'.
519: $hostname.'</a>';
520: }
521: $r->print(
522: '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">'
523: .'<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">'
524: .'<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>'
525: .&mt('The LearningOnline Network with CAPA')
526: .'</title></head>'
527: .'<body bgcolor="#FFFFFF">'
528: .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
529: .'<img src="/adm/lonKaputt/lonlogo_broken.gif" alt="broken icon" align="right" />'
530: .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>');
531: if ($spares) {
532: $r->print('<p>'.&mt('Please attempt to login to one of the following servers:')
533: .'</p>'
534: .$spares);
535: }
536: $r->print('</body>'
537: .'</html>'
538: );
539: return OK;
540: }
541:
542: # ----------------------------------------------- Apparently we are in business
543: $servadm=~s/\,/\<br \/\>/g;
544:
545: # ----------------------------------------------------------- Front page design
546: my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);
547: my $font=&Apache::loncommon::designparm('login.font',$domain);
548: my $link=&Apache::loncommon::designparm('login.link',$domain);
549: my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);
550: my $alink=&Apache::loncommon::designparm('login.alink',$domain);
551: my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);
552: my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);
553: my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);
554: my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);
555: my $logo=&Apache::loncommon::designparm('login.logo',$domain);
556: my $img=&Apache::loncommon::designparm('login.img',$domain);
557: my $domainlogo=&Apache::loncommon::domainlogo($domain);
558: my $showbanner = 1;
559: my $showmainlogo = 1;
560: if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
561: $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
562: }
563: if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
564: $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
565: }
566: my $showadminmail;
567: my @possdoms = &Apache::lonnet::current_machine_domains();
568: if (grep(/^\Q$domain\E$/,@possdoms)) {
569: $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
570: }
571: my $showcoursecat =
572: &Apache::loncommon::designparm('login.coursecatalog',$domain);
573: my $shownewuserlink =
574: &Apache::loncommon::designparm('login.newuser',$domain);
575: my $showhelpdesk =
576: &Apache::loncommon::designparm('login.helpdesk',$domain);
577: my $now=time;
578: my $js = (<<ENDSCRIPT);
579:
580: <script type="text/javascript" language="JavaScript">
581: // <![CDATA[
582: function send()
583: {
584: this.document.server.elements.uname.value
585: =this.document.client.elements.uname.value;
586:
587: this.document.server.elements.udom.value
588: =this.document.client.elements.udom.value;
589:
590: uextkey=this.document.client.elements.uextkey.value;
591: lextkey=this.document.client.elements.lextkey.value;
592: initkeys();
593:
594: this.document.server.elements.upass0.value
595: =getCrypted(this.document.client.elements.upass$now.value);
596:
597: this.document.client.elements.uname.value='';
598: this.document.client.elements.upass$now.value='';
599:
600: this.document.server.submit();
601: return false;
602: }
603:
604: function enableInput() {
605: this.document.client.elements.upass$now.removeAttribute("readOnly");
606: this.document.client.elements.uname.removeAttribute("readOnly");
607: this.document.client.elements.udom.removeAttribute("readOnly");
608: return;
609: }
610:
611: // ]]>
612: </script>
613:
614: ENDSCRIPT
615:
616: my ($lonhost_in_use,@hosts,%defaultdomconf,$saml_prefix,$saml_landing,
617: $samlssotext,$samlnonsso,$samlssoimg,$samlssoalt,$samlssourl,$samltooltip);
618: %defaultdomconf = &Apache::loncommon::get_domainconf($defdom);
619: @hosts = &Apache::lonnet::current_machine_ids();
620: $lonhost_in_use = $lonhost;
621: if (@hosts > 1) {
622: foreach my $hostid (@hosts) {
623: if (&Apache::lonnet::host_domain($hostid) eq $defdom) {
624: $lonhost_in_use = $hostid;
625: last;
626: }
627: }
628: }
629: $saml_prefix = $defdom.'.login.saml_';
630: if ($defaultdomconf{$saml_prefix.$lonhost_in_use}) {
631: $saml_landing = 1;
632: $samlssotext = $defaultdomconf{$saml_prefix.'text_'.$lonhost_in_use};
633: $samlnonsso = $defaultdomconf{$saml_prefix.'notsso_'.$lonhost_in_use};
634: $samlssoimg = $defaultdomconf{$saml_prefix.'img_'.$lonhost_in_use};
635: $samlssoalt = $defaultdomconf{$saml_prefix.'alt_'.$lonhost_in_use};
636: $samlssourl = $defaultdomconf{$saml_prefix.'url_'.$lonhost_in_use};
637: $samltooltip = $defaultdomconf{$saml_prefix.'title_'.$lonhost_in_use};
638: }
639: if ($saml_landing) {
640: if ($samlssotext eq '') {
641: $samlssotext = 'SSO Login';
642: }
643: if ($samlnonsso eq '') {
644: $samlnonsso = 'Non-SSO Login';
645: }
646: $js .= <<"ENDSAMLJS";
647:
648: <script type="text/javascript">
649: // <![CDATA[
650: function toggleLClogin() {
651: if (document.getElementById('LC_standard_login')) {
652: if (document.getElementById('LC_standard_login').style.display == 'none') {
653: document.getElementById('LC_standard_login').style.display = 'inline-block';
654: if (document.getElementById('LC_login_text')) {
655: document.getElementById('LC_login_text').innerHTML = '$samlnonsso';
656: }
657: if (document.getElementById('LC_SSO_login')) {
658: document.getElementById('LC_SSO_login').style.display = 'none';
659: }
660: } else {
661: document.getElementById('LC_standard_login').style.display = 'none';
662: if (document.getElementById('LC_login_text')) {
663: document.getElementById('LC_login_text').innerHTML = '$samlssotext';
664: }
665: if (document.getElementById('LC_SSO_login')) {
666: document.getElementById('LC_SSO_login').style.display = 'inline-block';
667: }
668: }
669: }
670: return;
671: }
672:
673: // ]]>
674: </script>
675:
676: ENDSAMLJS
677: }
678:
679: # --------------------------------------------------- Print login screen header
680:
681: my %add_entries = (
682: bgcolor => "$mainbg",
683: text => "$font",
684: link => "$link",
685: vlink => "$vlink",
686: alink => "$alink",
687: onload => 'javascript:enableInput();',);
688:
689: my ($headextra,$headextra_exempt);
690: $headextra = $defaultdomconf{$defdom.'.login.headtag_'.$lonhost_in_use};
691: $headextra_exempt = $defaultdomconf{$domain.'.login.headtag_exempt_'.$lonhost_in_use};
692: if ($headextra) {
693: my $omitextra;
694: if ($headextra_exempt ne '') {
695: my @exempt = split(',',$headextra_exempt);
696: my $ip = &Apache::lonnet::get_requestor_ip();
697: if (grep(/^\Q$ip\E$/,@exempt)) {
698: $omitextra = 1;
699: }
700: }
701: unless ($omitextra) {
702: my $confname = $defdom.'-domainconfig';
703: if ($headextra =~ m{^\Q/res/$defdom/$confname/login/headtag/$lonhost_in_use/\E}) {
704: my $extra = &Apache::lonnet::getfile(&Apache::lonnet::filelocation("",$headextra));
705: unless ($extra eq '-1') {
706: $js .= "\n".$extra."\n";
707: }
708: }
709: }
710: }
711:
712: $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
713: { 'redirect' => [$expire,'/adm/roles'],
714: 'add_entries' => \%add_entries,
715: 'only_body' => 1,}));
716:
717: # ----------------------------------------------------------------------- Texts
718:
719: my %lt=&Apache::lonlocal::texthash(
720: 'un' => 'Username',
721: 'pw' => 'Password',
722: 'dom' => 'Domain',
723: 'perc' => 'percent',
724: 'load' => 'Server Load',
725: 'userload' => 'User Load',
726: 'catalog' => 'Course/Community Catalog',
727: 'log' => 'Log in',
728: 'help' => 'Log-in Help',
729: 'serv' => 'Server',
730: 'servadm' => 'Server Administration',
731: 'helpdesk' => 'Contact Helpdesk',
732: 'forgotpw' => 'Forgot password?',
733: 'newuser' => 'New User?',
734: 'change' => 'Change?',
735: );
736: # -------------------------------------------------- Change password field name
737:
738: my $forgotpw = &forgotpwdisplay(%lt);
739: $forgotpw .= '<br />' if $forgotpw;
740: my $loginhelp = &Apache::lonauth::loginhelpdisplay($authdomain);
741: if ($loginhelp) {
742: $loginhelp = '<a href="'.$loginhelp.'">'.$lt{'help'}.'</a><br />';
743: }
744:
745: # ---------------------------------------------------- Serve out DES JavaScript
746: {
747: my $jsh=Apache::File->new($include."/londes.js");
748: $r->print(<$jsh>);
749: }
750: # ---------------------------------------------------------- Serve rest of page
751:
752: $r->print(
753: '<div class="LC_Box"'
754: .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'
755: );
756:
757: $r->print(<<ENDSERVERFORM);
758: <form name="server" action="/adm/authenticate" method="post" target="_top">
759: <input type="hidden" name="logtoken" value="$logtoken" />
760: <input type="hidden" name="serverid" value="$lonhost" />
761: <input type="hidden" name="uname" value="" />
762: <input type="hidden" name="upass0" value="" />
763: <input type="hidden" name="udom" value="" />
764: <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
765: <input type="hidden" name="localres" value="$env{'form.localres'}" />
766: </form>
767: ENDSERVERFORM
768: my $coursecatalog;
769: if (($showcoursecat eq '') || ($showcoursecat)) {
770: $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';
771: }
772: my $newuserlink;
773: if ($shownewuserlink) {
774: $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
775: }
776: my $logintitle =
777: '<h2 class="LC_hcell"'
778: .' style="background:'.$loginbox_header_bgcol.';'
779: .' color:'.$loginbox_header_textcol.'">'
780: .$lt{'log'}
781: .'</h2>';
782:
783: my $noscript_warning='<noscript><span class="LC_warning"><b>'
784: .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
785: .'</b></span></noscript>';
786: my $helpdeskscript;
787: my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
788: $authdomain,\$helpdeskscript,
789: $showhelpdesk,\@possdoms);
790:
791: my $mobileargs;
792: if ($clientmobile) {
793: $mobileargs = 'autocapitalize="off" autocorrect="off"';
794: }
795: my $loginform=(<<LFORM);
796: <form name="client" action="" onsubmit="return(send())" id="lclogin">
797: <input type="hidden" name="lextkey" value="$lextkey" />
798: <input type="hidden" name="uextkey" value="$uextkey" />
799: <b><label for="uname">$lt{'un'}</label>:</b><br />
800: <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" $mobileargs /><br />
801: <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
802: <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
803: <b><label for="udom">$lt{'dom'}</label>:</b><br />
804: <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" $mobileargs /><br />
805: <input type="submit" value="$lt{'log'}" />
806: </form>
807: LFORM
808:
809: if ($showbanner) {
810: my $alttext = &Apache::loncommon::designparm('login.alttext_img',$domain);
811: if ($alttext eq '') {
812: $alttext = 'The Learning Online Network with CAPA';
813: }
814: $r->print(<<HEADER);
815: <!-- The LON-CAPA Header -->
816: <div style="background:$pgbg;margin:0;width:100%;">
817: <img src="$img" border="0" alt="$alttext" class="LC_maxwidth" id="lcloginbanner" />
818: </div>
819: HEADER
820: }
821:
822: my $stdauthformstyle = 'inline-block';
823: my $ssoauthstyle = 'none';
824: my $logintype;
825: $r->print('<div style="float:left;margin-top:0;">');
826: if ($saml_landing) {
827: $ssoauthstyle = 'inline-block';
828: $stdauthformstyle = 'none';
829: $logintype = $samlssotext;
830: my $ssologin = '/adm/sso';
831: if ($samlssourl ne '') {
832: $ssologin = $samlssourl;
833: }
834: if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) {
835: my $querystring;
836: if ($env{'form.firsturl'} ne '') {
837: $querystring = 'origurl=';
838: if ($env{'form.firsturl'} =~ /[^\x00-\xFF]/) {
839: $querystring .= &uri_escape_utf8($env{'form.firsturl'});
840: } else {
841: $querystring .= &uri_escape($env{'form.firsturl'});
842: }
843: $querystring = &HTML::Entities::encode($querystring,"'");
844: }
845: if ($env{'form.ltoken'} ne '') {
846: $querystring .= (($querystring eq '')?'':'&') . 'ltoken='.
847: &HTML::Entities::encode(&uri_escape($env{'form.ltoken'}));
848: } elsif ($env{'form.linkkey'}) {
849: $querystring .= (($querystring eq '')?'':'&') . 'linkkey='.
850: &HTML::Entities::encode(&uri_escape($env{'form.linkkey'}));
851: }
852: if ($querystring ne '') {
853: $ssologin .= (($ssologin=~/\?/)?'&':'?') . $querystring;
854: }
855: } elsif ($logtoken ne '') {
856: $ssologin .= (($ssologin=~/\?/)?'&':'?') . 'logtoken='.$logtoken;
857: }
858: my $ssohref;
859: if ($samlssoimg ne '') {
860: $ssohref = '<a href="'.$ssologin.'" title="'.$samltooltip.'">'.
861: '<img src="'.$samlssoimg.'" alt="'.$samlssoalt.'" id="lcssobutton" /></a>';
862: } else {
863: $ssohref = '<a href="'.$ssologin.'">'.$samlssotext.'</a>';
864: }
865: if (($env{'form.saml'} eq 'no') ||
866: (($env{'form.username'} ne '') && ($env{'form.domain'} ne ''))) {
867: $ssoauthstyle = 'none';
868: $stdauthformstyle = 'inline-block';
869: $logintype = $samlnonsso;
870: }
871: $r->print(<<ENDSAML);
872: <p>
873: Log-in type:
874: <span style="font-weight:bold" id="LC_login_text">$logintype</span><br />
875: <span><a href="javascript:toggleLClogin();" style="color:#000000">$lt{'change'}</a></span>
876: </p>
877: <div style="display:$ssoauthstyle" id="LC_SSO_login">
878: <div class="LC_Box" style="padding-top: 10px;">
879: $ssohref
880: $noscript_warning
881: </div>
882: <div class="LC_Box" style="padding-top: 10px;">
883: $loginhelp
884: $contactblock
885: $coursecatalog
886: </div>
887: </div>
888: ENDSAML
889: } else {
890: if ($env{'form.ltoken'}) {
891: &Apache::lonnet::tmpdel($env{'form.ltoken'});
892: delete($env{'form.ltoken'});
893: }
894: }
895:
896: $r->print(<<ENDLOGIN);
897: <div style="display:$stdauthformstyle;" id="LC_standard_login">
898: <div class="LC_Box" style="background:$loginbox_bg;">
899: $logintitle
900: $loginform
901: $noscript_warning
902: </div>
903:
904: <div class="LC_Box" style="padding-top: 10px;">
905: $loginhelp
906: $forgotpw
907: $contactblock
908: $newuserlink
909: $coursecatalog
910: </div>
911: </div>
912:
913: ENDLOGIN
914: $r->print('</div><div>'."\n");
915: if ($showmainlogo) {
916: my $alttext = &Apache::loncommon::designparm('login.alttext_logo',$domain);
917: $r->print(' <img src="'.$logo.'" alt="'.$alttext.'" class="LC_maxwidth" id="lcloginmainlogo" />'."\n");
918: }
919: $r->print(<<ENDTOP);
920: $announcements
921: </div>
922: <hr style="clear:both;" />
923: ENDTOP
924: my ($domainrow,$serverrow,$loadrow,$userloadrow,$versionrow);
925: $domainrow = <<"END";
926: <tr>
927: <td align="left" valign="top">
928: <small><b>$lt{'dom'}: </b></small>
929: </td>
930: <td align="left" valign="top">
931: <small><tt> $domain</tt></small>
932: </td>
933: </tr>
934: END
935: $serverrow = <<"END";
936: <tr>
937: <td align="left" valign="top">
938: <small><b>$lt{'serv'}: </b></small>
939: </td>
940: <td align="left" valign="top">
941: <small><tt> $lonhost ($role)</tt></small>
942: </td>
943: </tr>
944: END
945: if ($loadlim) {
946: $loadrow = <<"END";
947: <tr>
948: <td align="left" valign="top">
949: <small><b>$lt{'load'}: </b></small>
950: </td>
951: <td align="left" valign="top">
952: <small><tt> $loadpercent $lt{'perc'}</tt></small>
953: </td>
954: </tr>
955: END
956: }
957: if ($uloadlim) {
958: $userloadrow = <<"END";
959: <tr>
960: <td align="left" valign="top">
961: <small><b>$lt{'userload'}: </b></small>
962: </td>
963: <td align="left" valign="top">
964: <small><tt> $userloadpercent $lt{'perc'}</tt></small>
965: </td>
966: </tr>
967: END
968: }
969: if (($version ne '') && ($version ne '<!-- VERSION -->')) {
970: $versionrow = <<"END";
971: <tr>
972: <td colspan="2" align="left">
973: <small>$version</small>
974: </td>
975: </tr>
976: END
977: }
978:
979: $r->print(<<ENDDOCUMENT);
980: <div style="float: left;">
981: <table border="0" cellspacing="0" cellpadding="0">
982: $domainrow
983: $serverrow
984: $loadrow
985: $userloadrow
986: $versionrow
987: </table>
988: </div>
989: <div style="float: right;">
990: $domainlogo
991: </div>
992: <br style="clear:both;" />
993: </div>
994:
995: <script type="text/javascript">
996: // <![CDATA[
997: // the if prevents the script error if the browser can not handle this
998: if ( document.client.uname ) { document.client.uname.focus(); }
999: // ]]>
1000: </script>
1001: $helpdeskscript
1002:
1003: ENDDOCUMENT
1004: my %endargs = ( 'noredirectlink' => 1, );
1005: $r->print(&Apache::loncommon::end_page(\%endargs));
1006: return OK;
1007: }
1008:
1009: sub check_loginvia {
1010: my ($domain,$lonhost,$lonidsdir,$balcookie) = @_;
1011: if ($domain eq '' || $lonhost eq '' || $lonidsdir eq '') {
1012: return;
1013: }
1014: my %domconfhash = &Apache::loncommon::get_domainconf($domain);
1015: my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost};
1016: my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost};
1017: my $output;
1018: if ($loginvia ne '') {
1019: my $noredirect;
1020: my $ip = &Apache::lonnet::get_requestor_ip();
1021: if ($ip eq '127.0.0.1') {
1022: $noredirect = 1;
1023: } else {
1024: if ($loginvia_exempt ne '') {
1025: my @exempt = split(',',$loginvia_exempt);
1026: if (grep(/^\Q$ip\E$/,@exempt)) {
1027: $noredirect = 1;
1028: }
1029: }
1030: }
1031: unless ($noredirect) {
1032: my ($newhost,$path);
1033: if ($loginvia =~ /:/) {
1034: ($newhost,$path) = split(':',$loginvia);
1035: } else {
1036: $newhost = $loginvia;
1037: }
1038: if ($newhost ne $lonhost) {
1039: if (&Apache::lonnet::hostname($newhost) ne '') {
1040: if ($balcookie) {
1041: my ($balancer,$cookie) = split(/:/,$balcookie);
1042: if ($cookie =~ /^($match_domain)_($match_username)_([a-f0-9]+)$/) {
1043: my ($udom,$uname,$cookieid) = ($1,$2,$3);
1044: unless (&Apache::lonnet::delbalcookie($cookie,$balancer) eq 'ok') {
1045: if ((-d $lonidsdir) && (opendir(my $dh,$lonidsdir))) {
1046: while (my $filename=readdir($dh)) {
1047: if ($filename=~/^(\Q$uname\E_\d+_\Q$udom\E_$match_lonid)\.id$/) {
1048: my $handle = $1;
1049: my %hash =
1050: &Apache::lonnet::get_sessionfile_vars($handle,$lonidsdir,
1051: ['request.balancercookie',
1052: 'user.linkedenv']);
1053: if ($hash{'request.balancercookie'} eq "$balancer:$cookieid") {
1054: if (unlink("$lonidsdir/$filename")) {
1055: if (($hash{'user.linkedenv'} =~ /^[a-f0-9]+_linked$/) &&
1056: (-l "$lonidsdir/$hash{'user.linkedenv'}.id") &&
1057: (readlink("$lonidsdir/$hash{'user.linkedenv'}.id") eq "$lonidsdir/$filename")) {
1058: unlink("$lonidsdir/$hash{'user.linkedenv'}.id");
1059: }
1060: }
1061: }
1062: last;
1063: }
1064: }
1065: closedir($dh);
1066: }
1067: }
1068: }
1069: }
1070: $output = &redirect_page($newhost,$path);
1071: }
1072: }
1073: }
1074: }
1075: return $output;
1076: }
1077:
1078: sub redirect_page {
1079: my ($desthost,$path) = @_;
1080: my $hostname = &Apache::lonnet::hostname($desthost);
1081: my $protocol = $Apache::lonnet::protocol{$desthost};
1082: $protocol = 'http' if ($protocol ne 'https');
1083: unless ($path =~ m{^/}) {
1084: $path = '/'.$path;
1085: }
1086: my $url = $protocol.'://'.$hostname.$path;
1087: if ($env{'form.firsturl'} ne '') {
1088: my $querystring;
1089: if ($env{'form.firsturl'} =~ /[^\x00-\xFF]/) {
1090: $querystring = &uri_escape_utf8($env{'form.firsturl'});
1091: } else {
1092: $querystring = &uri_escape($env{'form.firsturl'});
1093: }
1094: $querystring = &HTML::Entities::encode($querystring,"'");
1095: $url .='?firsturl='.$querystring;
1096: }
1097: if (($env{'form.ltoken'}) || ($env{'form.linkkey'} ne '')) {
1098: my %link_info;
1099: if ($env{'form.ltoken'}) {
1100: $link_info{'ltoken'} = $env{'form.ltoken'};
1101: } elsif ($env{'form.linkkey'} ne '') {
1102: $link_info{'linkkey'} = $env{'form.linkkey'};
1103: }
1104: my $token = &Apache::lonnet::tmpput(\%link_info,$desthost,'link');
1105: unless (($token eq 'con_lost') || ($token eq 'refused') ||
1106: ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
1107: $url .= (($url=~/\?/)?'&':'?') . 'ttoken='.$token;
1108: }
1109: }
1110: my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,
1111: {'redirect' => [0,$url],});
1112: my $end_page = &Apache::loncommon::end_page();
1113: return $start_page.$end_page;
1114: }
1115:
1116: sub contactdisplay {
1117: my ($lt,$servadm,$showadminmail,$authdomain,$helpdeskscript,$showhelpdesk,
1118: $possdoms) = @_;
1119: my $contactblock;
1120: my $origmail;
1121: if (ref($possdoms) eq 'ARRAY') {
1122: if (grep(/^\Q$authdomain\E$/,@{$possdoms})) {
1123: $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
1124: }
1125: }
1126: my $requestmail =
1127: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
1128: $authdomain,$origmail);
1129: unless ($showhelpdesk eq '0') {
1130: if ($requestmail =~ m/[^\@]+\@[^\@]+/) {
1131: $showhelpdesk = 1;
1132: } else {
1133: $showhelpdesk = 0;
1134: }
1135: }
1136: if ($servadm && $showadminmail) {
1137: $contactblock .= $$lt{'servadm'}.':<br />'.
1138: '<tt>'.$servadm.'</tt><br />';
1139: }
1140: if ($showhelpdesk) {
1141: $contactblock .= '<a href="javascript:helpdesk()">'.$lt->{'helpdesk'}.'</a><br />';
1142: my $thisurl = &escape('/adm/login');
1143: $$helpdeskscript = <<"ENDSCRIPT";
1144: <script type="text/javascript">
1145: // <![CDATA[
1146: function helpdesk() {
1147: var possdom = document.client.udom.value;
1148: var codedom = possdom.replace( new RegExp("[^A-Za-z0-9.\\-]","g"),'');
1149: if (codedom == '') {
1150: codedom = "$authdomain";
1151: }
1152: var querystr = "origurl=$thisurl&codedom="+codedom;
1153: document.location.href = "/adm/helpdesk?"+querystr;
1154: return;
1155: }
1156: // ]]>
1157: </script>
1158: ENDSCRIPT
1159: }
1160: return $contactblock;
1161: }
1162:
1163: sub forgotpwdisplay {
1164: my (%lt) = @_;
1165: my $prompt_for_resetpw = 1;
1166: if ($prompt_for_resetpw) {
1167: return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>';
1168: }
1169: return;
1170: }
1171:
1172: sub coursecatalog_link {
1173: my ($linkname) = @_;
1174: return <<"END";
1175: <a href="/adm/coursecatalog">$linkname</a>
1176: END
1177: }
1178:
1179: sub newuser_link {
1180: my ($linkname) = @_;
1181: return '<a href="/adm/createaccount">'.$linkname.'</a>';
1182: }
1183:
1184: sub decode_token {
1185: my ($info) = @_;
1186: my ($firsturl,@rest)=split(/\&/,$info);
1187: my %form;
1188: if ($firsturl ne '') {
1189: $form{'firsturl'} = &unescape($firsturl);
1190: }
1191: foreach my $item (@rest) {
1192: my ($key,$value) = split(/=/,$item);
1193: $form{$key} = &unescape($value);
1194: }
1195: return %form;
1196: }
1197:
1198: 1;
1199: __END__
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